Two-level edge guide



April 9 l1940 "r.' R. RoglNsQN 2,1%326 TWO-LEVEL lEDGE GUIDE Filed 66),.25, 1958 l 2 Sheets-Sheet l BY EEEATTORNEY pril 1940.4 i l T. R.RoBlNsofJ 2,196,326

TWO-LEVEL EDGE GUIDE Filed ocr. 25, 195e `2 sheets-sheet 2 IN VEN TOR.

72o@ Robinson I ATTORNEY Vlatented'Apr. 9,1940

- UNITED STATES `PATENT OFFICE TWO-LEVEL EDGE GUIDE Thomas E. Robinson,Everett, Wash. Applicltlon October 25, 1938, Sd'lll N0. 236,858

2 Claims.

This invention relates to edge guides for the adjacent edges of twosheets of material. More particularly, this invention relates tomechanism to guide pieces ot material into edge to edge re- 5lationship. so that the pieces of material may be adhered together, asby edge gluing, taping or stitching.

By way of illustration only. and not as a limitation of the invention, Iwill set forththe in- 10 vention as applicable to the edge taping of twostrips of material used in forming the face ply of a piece of plywood.It is, however, to be expressly understood that'tlie invention is notlimited to such particular ileld of utility. b ut is co- Il extensivewith all fields where simlar problems exist in whole or in part.

The prior art of taping together, in edge to edge relationship, twostrips of veneer is in part illustrated by the following Letters Patent:n Boenning, 709,864; Nystrom, 942,277; Dennis, 1,012,609; Kelly,1,022,092; and Runne, 1.126,-

292. In such prior art many-devices' were used to feed the tape and tourge' the stock together in gl abutting'edge to edge relationship andthe present invention may be used -with such priorjart devices. Alsoinvsuch prior` art devices, andparticularly in the commercial prior art,guides, as guide OI of Dennis, have been used. Buch g'uides a0 arerelatively thin in section and such guides were. generally termed in thecommercial art as "splitters". The present invention is particularlycharacterized by the substitution of the two level edge guide for suchsplit of the gg prior art and the balance of the mechanism may followthe prior art practices.v y

Infomiing the face plies of veneer, two pieces `oi! material are firstedge jointed 'so they will properly ilt to form a seam which'will not beg appreclably noticeable in the nnalproduct.

Then the two abutting edg must be guided to a taping machine or edgegluing device. If the edges overlap there will be a breaking down ofthecorners and an imperfect Joint. To eliminate this overlapping and toprovide a positive Vlimited spacing between the edges the "split-vtersof the prior art were employed. However,

in the event of grains extending angularly to the Yedgeandintheeventofaslighttearingofthls 60 the forward thin edge of theprior art split (which must be thin to provide the ldesired minimumspacing) would ,mlm the slightlytorn grain andtear thevsame so as toruin the piece. In other' words, where the."aplitggterwasnotused,therewasthedangerof (Cl. 14A-279) breaking downthe corners because of 'overlapping and consequent slow production inthe at' teinpt to prevent such overlapping. Also where the splitter" wasused there was the danger of torn grain. In the prior art use of tapingmag chines with the higher priced woods, it was not uncommon toeliminate the splitter to elimi nate the possibility of torn grain.

It is an object of this invention to provide a two level guide, whereone .ply is traveling on one 10 v level' and the edge thereof is guidedand the second ply is traveling yon a vertically spaced level asrespects the rst mentioned level and is guided on said level.

It is a further object to provide means to bring ll the two plies to acommon level after being guided on vertically spaced levels.

It is a further object to provide additional guiding means in the natureof curved or diverging surface members to facilitate the abut n ting ofthe edges of the stock firmly against the guides. v Y

It is a further object of the invention to prolvide a guide which willpositively eliminate any possibility of tearing of the grain, and atthel u same tne with an increased rate'of production.

It is afurther object to providefa guide which will insureproper'positioning of the stock with a minimum eifort and with maximumeiciency.

. The above mentioned general objects of my .o invention. together withothers inherent inthe same, are attained by thedevices illustrated in.the following drawings, the same being preferred exemplary forms ofembodiment of my invention. throughout which drawings like reference 35numerals indicate like parts: A v l Figure l is a side elevation withone deck or level shown in section, and withparts-broken away of adevice embodying the invention;

. Fig. 2 is a plan view taken substantiallylon n brokenv line 2-2 ofFigure 1 with parts broken away and with the feed rolls and presserrolls v and the driven pressure roll detached and shown `in operativeposition; Fig. 3 is a sectionalview taken substantially on broken line3-3 of Fig. 2; v

Fig. 4 is a sectional view taken substantially on broken line l-l ofFig. 2; f

Fig. 5 is a fragmentary plan view with the hold e down spring removedand showing 'two pieces w of material each havingk a `dot and dash linePO'.. sition and a full line position and with two in, dicating arrowsiliustratingthe initial feeding of the material: f

l'ig. 6 is another fragmentary plan view simi-` u lar toFig. 5, butshowing the two sheets of material in a later position duringtravel;

Fig. l is a sectional view taken substantially on broken line l-l ofFig. 6 and showing the fragments of two pieces of material in place;

Fig. 8 is a detached bottom perspective view showing the guide membershown in the previous figures; and

Fig. 9 is a view similar to Fig. 2 of a modified form of the invention,and showing fragments of sheets of material.

In view of the fact that the two level guide of this invention may beapplied to various taping machines of the prior art, the taping machineproper here illustrated, by Way of example, is copied substantially fromthe patent to Dennis, 1,012,609, and particularly Fig. 2 thereof. In theinterest of brevity many of the parts of the taping machine proper arebroken away.

Generally describing the operationA of the taping machine proper, whichforms no part of this invention, two pieces of material in adjacent edgeto edge relation are supported on bed I2. As the piecesof material areurged towards the taping machine, each is urged between a dn'ven roll I3and presser rolls I4. The presser rolls I4 are frustro-conical in shape,with the larger diameters adjacent each other. The shape of the presserrolls is one well known expedient to urge the pieces of stock intoabutting edge to edge relationship. The driven rolls I3 are supported bythe bed I2 and the brackets I5 serve -to support presser rolls I4. Thebrackets I5 are supported on the upper and adjustable frame I6. A shoeI1 is secured to brackets I5 and serves as a supportfor the spring ngersIl. 'Ihe spring fingers I8 operate between presser rolls I4 and urge theabutting edges of the stock down against the bed I2. Bevel frictionpressure roller disks I9 serve to urge the pieces of stock together asthe stock passes under driven presser roll 23. The roll is supported onthe adjust- .able frame I6. The frame I6 is adjusted by levers 2| and 22(partly broken away) to adjust the tapingdevice to accommodate pieces ofmaterial of different thicknesses. 'Ihe frame I3 is resilientlysupported by springs, as spring 23, on-

sleeve 24. The tape may be supported in the usual roll form on arm 26.The tape 25 is pro-.

vided with the .usual adhesive material thereon so that the same willadhere when moistened.

While any of the usual means may be employed for moistening'the adhesivematerial on the tape 25 or applying an adhesive material thereto, Iprefer to use the steam jet 21, past which the tape 25 is led, tomoisten the adhesive'material on the tape. tened, is led between presserrolls |4 and thence under driven pressure roll 2U. The driven pressureroll!! is generally heated to aid.'in drying of the glue on tape 25.

Referring to the two level guide which is the subject matter of thisinvention (the' above gen- -eral description of the taping machineproper being given to illustrate an environment of this invention) thesame is shown in detached bottom perspective view in Fig. 8. A piece ofmaterial 23 is initially positioned substantially as shown by dot anddash lines in Fig. 5. The piece of material 28 rests onthe lower bed or'deck 23. The material is urged in the direction of the arrow in Fig. 5into theful line position of the piece of material shown in Fig. 5. Theforward inside corner portion of the piece of material 2l may engagewith the curved portion 'Ihe tape, after being mois.

aioasae 30 of the lower guide. As the material is urged forwardly andinwardly, it will follow the curved surface 30 and abut against anupright guide surface formed by the guide 3I-see Figs. 5, 6 and 7. Alsothe forward inside corner portion of the piece of material 28 may beurged directly against the guide surface 3|. At the same time, anotherpiece of material 32 on the upper level or deck33 will be urgedforwardly and inwardly from the dot and dash line position of Fig. 5 toits full line position in Fig. 5. The forward inside corner of the pieceof material 32 may engage with the curved portion 34 of the upper guideand will follow the curve 34 until the piece of material 32 abutsagainst the upright guide surface formed by the guide 35 on the upperlevel. Also the forward inside corner portion of the piece of material32 may be urged directly against the guide surface '35. The surfaces 30and 34 are preferably curved as shown but other angularly diverging'surfaces will bring satisfaci In Fig. 9 angularly' tory commercialresults. diverging surfaces 39 and 40 replace the curved surfaces 30 and34 and the remainder of the parts 'are numbered similarly to similarparts in the,

other figures. Also in Fig. 9, the open tears 4| in the grain are shownbefore the traveling board .encounters the diverging surfaces, as 39 or40,

' and the action of the diverging surfaces in closing such tears isillustrated by closed tears 42.

The upper deck 33 is flush with the deck 36 of the guide proper. As ameans of bringing both pieces `of material to a common level, the deck36, see Figure 1, is-inclined downwardly so'that the piece of material32 is directed downwardly. After the two boards, one on the lower level29 and one on the upper level 36, pass under the spring member 3l, theyare urged towards a common level so ,that at the time the pieces pass,under the presser rolls .I4, they are at a common level. The guidesl 3|and 35 may be in'a com- -mon plane or may be offset from each other tothe frustro-conical shape of the presser rolls I4 1 and the bevelfriction roller discs I3 arev sufcient to urge theadjacent edges of thetwo pieces of material 2l and 32 into firm, abutting relationship. On'the other hand, if the adjacent edges of the sheets of material 28 and32 slightly overlap, there will be a tearing of the grain and breakingdown of the corners when the two sheets are brought to a common levelunder the spring 31. In other words, the function of all splitters orguides is to bring the adjacent -edges very close to each other, but notin abutting relation to prevent tearing, of the grain. If a slight crackor space is left between the sheets this may be taken-care of by thepressure means in the taping machine proper. In this device, in view of4the fact that the guide for each piece -of material is on a differentlevel, the adjacent 4edges of the two traveling pieces of material maybe brought into positive predetermined spaced relation and there is nolimitation of positioning such as required by the thickness of asplitter in the prior art machines. Furthermore, due to the I,

two levels, adhesive material may be readily applied to the edges of thesheets while the sheets are on different levels for edge gluing. As theabutting edges of the two pieces of material 28 and 32 pass under drivenpressure roll 28, the adhesive tape 25 is urged into place and adheresthe sheets in abutting edge to edge relationship.

In the operation of the device the sheets are fed sideways onthe "decks33 and 29 to the operator and he grasps the rear portion of sheets 28and 32. In order to provide a minimum difference in level between decks88 and 29, the wall 38 is inclined relative to the deck 29, facilitatingthe insertion of warped stock against 'guide 8i. The operator urges bothsheetsy inwardly and forwardly in accordance with the direction of thearrows in Fig. 5. The operator may urge the sheets to engage the guides35 and 3|, or may urge the sheets in an inward direction past theguides. In the latter instance, the curved portions 34 and 38 bring thestock outwardly and the curved portions 84 and 30 serve as initial guidemeans. Also any torn grain will be forced back into its originalposition, forming a straight edge and not split as it engages the saidlcurved portions 84 and 30. The sheets 82 and 28 are y .thus spacedapart a predetermined distance and are on different levels as shown inFig. 7. The deck 86 on the upper level is inclinedvdownwardly so thatthe sheets 82 and 28 are urged into `a common plane by the hold-downspring 21. As the pieces of material pass between driven rolls I8 andpresser rolls I4, they are urged in firmly in place and partiallydriedby the driven pressure roll 2l.

Obviously. changes may be made in the forms. dimensions and arrangementof the parts of my invention, without departing vfrom the principlethereof, the above setting forth only preferred forms of embodiment.

I claim:

1. A guide for positioning traveling sheet material in edge toedgerelationship comprising a rst deck membenfor supporting travelingmaterial; a first upright guide surface for edge guiding travelingmaterial on said rst deck member; a second deck member vertically spacedfrom said flrst deck member for supporting traveling material; a secondupright guide surface v for edge guiding traveling material/on saidsecond deck member; and an inclined surface member connected with thesecond deck member to' direct traveling material from the second deckmember to a common level with the traveling material from the first deckmember. f.

2. A guide for positioning traveling sheet material in edge to edgerelationship comprising a first deck member for supporting travelingmaterial; a first upright guide surface for edge guiding travelingmaterial on said rst deck member; a first dlverging edge guide memberconnected with the forward portion of said rst.

portion of said second upright guide surface and $8 diverging away fromthe second deck member; and an inclined surface member carried by thesecond deck member to direct traveling material from the second deckmember to a common level with traveling material from the first deck o

